Stub fcntl in Ansible EE and expose support path

Borealis.ps1

@@ -601,15 +601,67 @@ function Ensure-AnsibleExecutionEnvironment {
         $metadata['requirements_hash'] = $requirementsHash
     }
 
+    $supportDir = Join-Path $eeRoot 'support'
     try {
-        $metadata | ConvertTo-Json -Depth 5 | Set-Content -Path $metadataPath -Encoding UTF8
+        New-Item -ItemType Directory -Force -Path $supportDir | Out-Null
+    } catch {}
+
+    $fcntlStubPath = Join-Path $supportDir 'fcntl.py'
+    $fcntlStub = @'
+"""Compat shim for POSIX-only fcntl module.
+
+Generated by Borealis to allow Ansible tooling to run on Windows hosts
+where the standard library fcntl module is unavailable. The stub provides
+symbol constants and no-op function implementations so imports succeed.
+"""
+
+LOCK_SH = 1
+LOCK_EX = 2
+LOCK_UN = 8
+LOCK_NB = 4
+
+F_DUPFD = 0
+F_GETFD = 1
+F_SETFD = 2
+F_GETFL = 3
+F_SETFL = 4
+
+FD_CLOEXEC = 1
+
+def ioctl(*_args, **_kwargs):
+    return 0
+
+
+def fcntl(*_args, **_kwargs):
+    return 0
+
+
+def flock(*_args, **_kwargs):
+    return 0
+
+
+def lockf(*_args, **_kwargs):
+    return 0
+'@
+
+    try {
+        if (-not (Test-Path (Join-Path $supportDir '__init__.py') -PathType Leaf)) {
+            Set-Content -Path (Join-Path $supportDir '__init__.py') -Value '' -Encoding UTF8NoBOM
+        }
+        Set-Content -Path $fcntlStubPath -Value $fcntlStub -Encoding UTF8NoBOM
+    } catch {
+        Write-AgentLog -FileName $LogName -Message "[AnsibleEE] Failed to seed Windows fcntl compatibility shim: $($_.Exception.Message)"
+    }
+
+    try {
+        $metadata | ConvertTo-Json -Depth 5 | Set-Content -Path $metadataPath -Encoding UTF8NoBOM
     } catch {
         Write-AgentLog -FileName $LogName -Message "[AnsibleEE] Failed to persist metadata.json: $($_.Exception.Message)"
         throw "Unable to persist Ansible execution environment metadata."
     }
 
     try {
-        Set-Content -Path $versionTxtPath -Value $expectedVersionNorm -Encoding UTF8
+        Set-Content -Path $versionTxtPath -Value $expectedVersionNorm -Encoding UTF8NoBOM
     } catch {}
 
     Write-AgentLog -FileName $LogName -Message "[AnsibleEE] Execution environment ready at $eeRoot"